@electronic{developer.android.com,
   title       = {Android API Levels | Android Developers}, 
   url         = {http://developer.android.com/guide/appendix/api-levels.html},
   biburl      = {https://puma.uni-kassel.de/url/8b14081ba1b138e64f1f62706cb0c2cf/stefani},
   keywords    = {android api level mynfcproject programming},
   added-at    = {2011-03-10T13:57:23.000+0100},
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   interhash   = {8b14081ba1b138e64f1f62706cb0c2cf}, 
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@electronic{developer.android.com,
   title       = {android.nfc | Android Developers}, 
   url         = {http://developer.android.com/reference/android/nfc/package-summary.html},
   biburl      = {https://puma.uni-kassel.de/url/05b6f4bec17a1adf130a3728a6104be5/stefani},
   keywords    = {android mynfcproject nfc},
   added-at    = {2011-03-10T11:48:04.000+0100},
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